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25 changes: 10 additions & 15 deletions
25
core/common/src/main/java/com/looker/core/common/extension/File.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,26 +1,21 @@ | ||
| package com.looker.core.common.extension | ||
|
|
||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.ensureActive | ||
| import kotlinx.coroutines.withContext | ||
| import kotlinx.coroutines.yield | ||
| import kotlinx.coroutines.* | ||
| import java.io.File | ||
| import java.io.FileOutputStream | ||
| import java.io.InputStream | ||
|
|
||
| val File.size: Long? | ||
| get() = if (exists()) length().takeIf { it > 0L } else null | ||
|
|
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| suspend fun File.readFrom(input: InputStream) = withContext(Dispatchers.IO) { | ||
| suspend infix fun InputStream.writeTo(file: File) = withContext(Dispatchers.IO) { | ||
| val buffer = ByteArray(DEFAULT_BUFFER_SIZE) | ||
| var bytesRead = input.read(buffer) | ||
| val output = FileOutputStream(this@readFrom) | ||
| while (bytesRead != -1) { | ||
| ensureActive() | ||
| output.write(buffer, 0, bytesRead) | ||
| yield() | ||
| bytesRead = input.read(buffer) | ||
| var bytesRead = read(buffer) | ||
| file.outputStream().use { output -> | ||
| while (bytesRead != -1) { | ||
| ensureActive() | ||
| output.write(buffer, 0, bytesRead) | ||
| bytesRead = read(buffer) | ||
| } | ||
| output.flush() | ||
| } | ||
| output.flush() | ||
| output.close() | ||
| } |
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52 changes: 52 additions & 0 deletions
52
core/common/src/main/java/com/looker/core/common/signature/HashChecker.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package com.looker.core.common.signature | ||
|
|
||
| import com.looker.core.common.extension.exceptCancellation | ||
| import com.looker.core.common.hex | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.ensureActive | ||
| import kotlinx.coroutines.withContext | ||
| import java.io.File | ||
| import java.security.MessageDigest | ||
|
|
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| suspend fun File.verifyHash(hash: Hash): Boolean = withContext(Dispatchers.IO) { | ||
| try { | ||
| val digest = MessageDigest | ||
| .getInstance(hash.name) | ||
| if (length() < Int.MAX_VALUE) { | ||
| return@withContext digest | ||
| .digest(readBytes()) | ||
| .hex() | ||
| .equals(hash.hash, ignoreCase = true) | ||
| } | ||
| val buffer = ByteArray(DEFAULT_BUFFER_SIZE) | ||
| inputStream().use { input -> | ||
| var bytesRead = input.read(buffer) | ||
| while (bytesRead >= 0) { | ||
| ensureActive() | ||
| digest.update(buffer, 0, bytesRead) | ||
| bytesRead = input.read(buffer) | ||
| } | ||
| digest | ||
| .digest() | ||
| .hex() | ||
| .equals(hash.hash, ignoreCase = true) | ||
| } | ||
| } catch (e: Exception) { | ||
| e.exceptCancellation() | ||
| false | ||
| } | ||
| } | ||
|
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| sealed class Hash(val name: String, val hash: String) | ||
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| data class SHA256(val value: String) : Hash(name = "sha256", hash = value) { | ||
| init { | ||
| require(value.length == 64) | ||
| } | ||
| } | ||
|
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| data class MD5(val value: String) : Hash(name = "md5", hash = value) { | ||
| init { | ||
| require(value.length == 32) | ||
| } | ||
| } |
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